EP0286049B1 - Verfahren und Vorrichtung zur Produktions- und Qualitätsüberwachung der Produktionsstellen an mehrspindligen Textilmaschinen - Google Patents

Verfahren und Vorrichtung zur Produktions- und Qualitätsüberwachung der Produktionsstellen an mehrspindligen Textilmaschinen Download PDF

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Publication number
EP0286049B1
EP0286049B1 EP88105387A EP88105387A EP0286049B1 EP 0286049 B1 EP0286049 B1 EP 0286049B1 EP 88105387 A EP88105387 A EP 88105387A EP 88105387 A EP88105387 A EP 88105387A EP 0286049 B1 EP0286049 B1 EP 0286049B1
Authority
EP
European Patent Office
Prior art keywords
receiver
production
transmitter
thread
production points
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88105387A
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German (de)
English (en)
French (fr)
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EP0286049A1 (de
Inventor
Ernst Felix
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uster Technologies AG
Original Assignee
Zellweger Uster AG
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Filing date
Publication date
Application filed by Zellweger Uster AG filed Critical Zellweger Uster AG
Publication of EP0286049A1 publication Critical patent/EP0286049A1/de
Application granted granted Critical
Publication of EP0286049B1 publication Critical patent/EP0286049B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • D01H13/1633—Electronic actuators
    • D01H13/165—Photo-electric sensing means

Definitions

  • the invention is now to provide a device which enables production and quality monitoring of the production sites at a reasonable cost and which also responds sufficiently quickly.
  • the invention relates to a device for production and quality monitoring of the production sites on multi-spindle textile machines, in which the production sites are arranged in rows and the thread running at each production site occupies an at least approximately extended position in the monitoring area, with a monitoring organ assigned to several production sites, with a transmitter and a receiver through which a beam of rays which is movable relative to the production points and oriented transversely to the direction of the thread runs.
  • the device according to the invention is characterized in that a common monitoring device is provided for a group of at least two production sites and that its radiation beam is only moved within this group and across the connecting line of the individual production sites and is shaded by the thread of a production site, whose size measured from the receiver forms a criterion for the presence of the thread in question and / or a measure of the size of its diameter.
  • the basic idea of the invention is therefore to use neither a monitoring device for each production site nor a common traveling sensor for the entire side of a machine, but to provide a monitoring device for a group of production sites.
  • the bundle of rays is preferably oriented obliquely to the connecting line of the individual production points and thus strikes the threads at the individual production points one after the other, so that successive shading impulses occur. It is essential for the accuracy and meaningfulness of the measurement that only one thread crosses the ray bundle at a certain point in time, i.e. that the individual shading pulses are clearly separated from one another and can therefore be clearly assigned to the respective production site.
  • the size of the groups is a matter of discretion and is determined by practical parameters. For example, the frequency of the scanning of a certain production site has an influence and it should also be noted that the light intensity may no longer be sufficient if the transmitter and receiver are at greater distances. The latter of course does not apply to laser beams.
  • Fig. 1 shows a schematic floor plan of eight production points of a multi-spindle textile machine, symbolized by eight threads 1 to 8 running through these production points perpendicular to the plane of the drawing.
  • These production points are assigned a common monitoring device which has a transmitter S for a light beam L and a receiver E for this having.
  • Transmitter S and receiver E are arranged such that the light bundle L forms an acute angle a with the connecting axis H of the production sites 1 to 8 arranged in a row.
  • the light beam L must continuously scan the individual production sites with a certain frequency. This scanning takes place in that transmitter S and receiver E and thus also the light beam L, or in other words, the monitoring device, from the initial position S, E, L drawn in full lines in the direction of arrow P into the end position S ⁇ shown in dashed lines, E ⁇ , L ⁇ can be moved.
  • FIG. 2 shows a corresponding pulse diagram, in which on the The time t between the starting and end positions T1 and T2 of the monitoring device and the ordinate the shading A, which results from the threads 1 to 8, is plotted on the abscissa. Each shadowing by one of the threads 1 to 8 is symbolized by a shading pulse I1 to I8.
  • the size of the shading I1 to I8 is a measure of the diameter of the thread in question. If there is no thread at the production site concerned, for example because of a thread break, then there is no shadowing and no shading impulse is registered.
  • each production site and each of the threads 1-8 is scanned with a certain frequency. Since the threads have generally moved between two scans, a different thread location is always scanned.
  • the known quality parameters such as the coefficient of variation of the unevenness, the spectrogram, etc. can be calculated from a sufficient number of sampling points. A complete pulse sequence is not necessary for this. Rather, interruptions are permissible because there is enough material and time for the evaluation in an "on-line" measurement of the type described.
  • the size of the shading is included in the evaluation, it is not only cost-effective to do a thread break detection, but also to achieve comprehensive quality monitoring of each individual production site.
  • the number of production sites assigned to a common monitoring device S, E, L (FIG. 1) is variable within wide limits and the number of eight such production sites selected as an example is rather at the lower limit.
  • S, E, L The number of production sites assigned to a common monitoring device S, E, L (FIG. 1) is variable within wide limits and the number of eight such production sites selected as an example is rather at the lower limit.
  • the number of production sites can be further limited by problems with the optics, since the light intensity with the square of the distance from the receiver decreases to the transmitter. Disturbing light and noise can cover up the useful signal. A considerable improvement is possible if the light is modulated in a known manner. External influences can thus be eliminated.
  • FIGS. 3 and 4 show a first embodiment of this type, FIG. 3 showing a view of a thread row of a production machine in the direction of the connecting axis H of FIG. 1, and FIG. 4 showing a view in the direction of the arrow IV in FIG. 3.
  • the threads 1 to 8 are arranged in a row along a straight line, as in FIG. 1.
  • a swivel arm 9 carrying the transmitter S
  • a corresponding swivel arm 10 carrying the receiver E is arranged.
  • Each swivel arm is mounted on a corresponding stationary axis 11 or 12 and the connecting line between these axes runs like the light beam L in FIG. 1 at an angle to the row of threads 1-8. If the two swivel arms 9 and 10 are pivoted simultaneously and in the same direction into the position shown in dashed lines, the movement of the transmitter, receiver and light beam indicated in FIG. 1 takes place from the position S, E, L into the position S ⁇ , E ⁇ , L ⁇ and the described scanning of the individual production sites occurs.
  • FIG. 5 shows a schematic plan view of a variant of the arrangement shown in FIG. 1, in which only the transmitter S, but not the receiver E needs to be moved.
  • the prerequisite for this is that the stationary receiver E is at a relatively large distance from the neighboring production site 8, and that the path of movement of the transmitter S is approximately twice as large as in the arrangement of FIG. 1.
  • Only half of the elements need transmitters for this S and receiver E to be moved, and in particular there is no synchronization of the movement of transmitter S and receiver E.
  • the transmitter and receiver can be interchanged.
  • FIG. 6 shows a schematic plan view of a further variant of the arrangement from FIG. 1, in which a mirror is used to reflect the light beam L.
  • the transmitter S and receiver E are arranged on one side of a thread row 1-8 to be monitored, and on the other side there is a pivotable mirror 13.
  • the light beam L emitted by the transmitter S thrown by the mirror 13 in its position shown in full lines as a reflected beam L1 onto the receiver E, the reflected beam L1 not yet crossing the thread 1.
  • the mirror 13 assumes the position shown in broken lines, a light beam L ⁇ emitted by the transmitter S reaches the receiver E as a reflected beam L1 ⁇ and does not cross the thread 8 any longer.
  • a person skilled in the art still has a whole series of options for having a light beam sweep across a row of threads by means of a moving light source and / or mirror.
  • options are particularly interesting in which a special moving part is not required for the movement of the light beam, but rather an existing movement of the textile machine can be used.
  • FIGS. 7 and 8 show a view in the direction of the axis H (FIG. 1) of a thread row to be monitored in the area of the so-called front cylinder of a ring spinning machine
  • FIG. 8 shows a view in the direction of the arrow VIII in FIG. 7.
  • the threads 1 to 8 are guided over the rotatably driven front cylinder 14 of the drafting system and lie in a defined plane in the monitoring area.
  • the monitoring device has the structure shown in FIG. 6 with transmitter S, emitted light beam L, reflected light beam L1, moving mirror 13 and receiver E the difference that transmitter S and receiver E are arranged on different sides of the thread row 1-8, and that the plane spanned by the emitted and reflected light beam L or L1 runs obliquely to the plane of the threads 1-8.
  • the mirror 13 is fixedly mounted on the front cylinder 14, preferably at a gradation or at another suitable location, and rotates with the front cylinder 14 and reaches the emitted light beam L with each revolution for a certain period of time and reflects this as light beam L1 Receiver E. Since the mirror 13 continues to rotate during this period, the individual threads 1 to 8 are scanned as described with reference to FIG. 6.
  • the mirror 13 is preferably designed as a spherical cap.
  • known elements for example luminescent diodes or photodiodes, are used as transmitters and receivers.
  • the processing of electrical impulses is well known and therefore need not be described in detail.
  • the shading represents a voltage or a current pulse. Both sizes are easy to measure and can easily be converted into binary signals and are therefore ideally suited for further processing by means of electronic data processing, preferably microprocessors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
EP88105387A 1987-04-10 1988-04-05 Verfahren und Vorrichtung zur Produktions- und Qualitätsüberwachung der Produktionsstellen an mehrspindligen Textilmaschinen Expired - Lifetime EP0286049B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1397/87A CH672331A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-04-10 1987-04-10
CH1397/87 1987-04-10

Publications (2)

Publication Number Publication Date
EP0286049A1 EP0286049A1 (de) 1988-10-12
EP0286049B1 true EP0286049B1 (de) 1992-06-17

Family

ID=4209475

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Application Number Title Priority Date Filing Date
EP88105387A Expired - Lifetime EP0286049B1 (de) 1987-04-10 1988-04-05 Verfahren und Vorrichtung zur Produktions- und Qualitätsüberwachung der Produktionsstellen an mehrspindligen Textilmaschinen

Country Status (5)

Country Link
US (1) US4909027A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0286049B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS63270822A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH672331A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3872019D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106987942A (zh) * 2017-06-12 2017-07-28 盐城工业职业技术学院 断纱检测装置及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE702396A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1963-02-19 1968-01-15

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE702396C (de) * 1933-04-30 1941-02-06 Joseph Hindermayr Auspuffhupe
GB1283528A (en) * 1968-12-18 1972-07-26 Crabtree Engineering Group Col An improved method and apparatus for detecting yarns
DE2134527A1 (de) * 1971-07-10 1973-01-25 Hoechst Ag Photoelektrische vorrichtung zur ueberwachung einer vielzahl changierender faeden auf bruch
GB1463453A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-04-13 1977-02-02
CH612152A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-01-26 1979-07-13 Rieter Ag Maschf
US4095401A (en) * 1976-06-02 1978-06-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for stopping a flyer frame
CH601093A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-11-05 1978-06-30 Zellweger Uster Ag
CH615404A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-03-22 1980-01-31 Zellweger Uster Ag
CH625484A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-10-05 1981-09-30 Loepfe Ag Geb
US4160360A (en) * 1978-07-27 1979-07-10 Owens-Corning Fiberglas Corporation Optical strand sensor for detecting a filament being wound and twisted on a spool
CH635299A5 (de) * 1979-03-26 1983-03-31 Mayer Stephan Verfahren und vorrichtung zum messen der laenge eines von einem spinnkops oder von einer in wilder wicklung bewickelten garnspule ueber kopf abgezogenen fadens.
JPS5940926B2 (ja) * 1980-06-26 1984-10-03 村田機械株式会社 糸状物体のバル−ン評価方法
FR2508882B1 (fr) * 1981-07-06 1985-08-16 Inst Textile De France Systeme de detection de la presence de fils sur un continu a filer
JPS5862511A (ja) * 1981-10-09 1983-04-14 Murata Mach Ltd 糸ムラ情報の解析方法および解析装置
CH655917A5 (de) * 1982-03-11 1986-05-30 Loepfe Ag Geb Elektronische abfrageschaltung zur ueberwachung einer vielzahl von fadenlaufstellen an einer textilmaschine.
DE3506013A1 (de) * 1984-03-08 1985-09-12 Winfried Prof. Dr.-Ing. 4050 Mönchengladbach Rehr Vorrichtung zur fadenbrucherfassung und zum fadenabstellen an garnerzeugenden maschinen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE702396A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1963-02-19 1968-01-15

Also Published As

Publication number Publication date
JPS63270822A (ja) 1988-11-08
DE3872019D1 (de) 1992-07-23
US4909027A (en) 1990-03-20
CH672331A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-11-15
EP0286049A1 (de) 1988-10-12

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